Troubleshooting Tip: Port Mirroring is not available in Hardware Switch

To create the SPAN or port mirroring the below article can be followed:
Technical Tip: SPAN (Port Mirroring) using ports associated to underlying switch chip/driver

If the port mirroring cannot be found under the hardware switch settings in the CLI or the configuration disappears after saving, the following debug has to be run in the CLI session.

CLI:

diagnose debug reset
diagnose debug cli 8

diagnose debug enable

After running the commands in the CLI, the configuration can be done in GUI and once done the following output may appear in the debug.

[__create_file_new_version:312] the new version config file '/data/./config/sys_global.conf.gz.v000000029' is created
[symlink_config_file:379] a new version of '/data/./config/sys_global.conf.gz' is created: /data/./config/sys_global.conf.gz.v000000029
[symlink_config_file:423] the old version '/data/./config/sys_global.conf.gz.v000000028' is deleted
[symlink_config_file:425] '/data/./config/sys_global.conf.gz' has been symlink'ed to the new version '/data/./config/sys_global.conf.gz.v000000029'. The old version '/data/./config/sys_global.conf.gz.v000000028' has been deleted
zip config file /data/./config/sys_global.conf.gz success!

If a similar report is found after the interfaces in SPAN disappear or the settings vanish after configuration, report it to the Fortinet Technical Assistant Center.

Alternatively, packets can be mirrored for the NP7 processor for offloaded traffic. The following documents can be followed to configure port mirroring for the packets offloaded by NP7.

Mirroring packets offloaded by NP7 processors

Lastly, not all the protocols will be offloaded by the NP7 processor and the list of supported protocols can be found in the hardware acceleration guide below.

Protocols that can be offloaded by NP7 processors